JP2543583Y2 - Top structure of supply / exhaust air supply / exhaust water heater - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Industrial application field The present invention relates to a supply / exhaust top structure of a forced supply / exhaust water heater.

(B) Conventional technology In recent years, as one form of a supply / exhaust top structure of a forced supply / exhaust water heater, there is a structure shown in FIGS. 5 and 6.

Such a top structure is substantially equivalent to a through hole provided in the wall 1.
An exhaust cylinder 3 is provided concentrically within a supply cylinder 2 extending laterally through 1a, and a supply hole 4 is provided at a tip end side of the supply cylinder 2 to communicate the inside of the supply cylinder 2 with outside air. An exhaust port 5 is provided on a lower peripheral surface of the exhaust pipe 2, and a distal end opening of the exhaust pipe 3 is connected to a peripheral edge of the exhaust port 5 so that the exhaust pipe 3 communicates with the outside air.

 Reference numeral 7 denotes a bird-proof plate installed in front of the air supply hole 4.

With this configuration, the direction of the streamline of the exhaust gas discharged downward from the exhaust port 5 through the exhaust path 6 and the direction of the streamline of the air sucked from the air supply hole 4 provided at the distal end surface of the air supply cylinder 2 are defined. Since the exhaust gas is made different and separated, the exhaust gas is not supplied from the air supply hole 4, and it is possible to prevent the occurrence of a problem that the exhaust gas is supplied to the combustion chamber of the water heater and combustion failure occurs. .

(C) Problems to be solved by the invention However, the supply / exhaust top structure of the forced supply / exhaust water heater still has the following problems to be solved.

That is, in the supply / exhaust top structure, as shown in FIG. 5, the projection length from the wall 1 to the exhaust hole 5 needs to be 150 mm or more according to the gas detection rule. The length L became long, and the aesthetics of the building was significantly impaired.

In addition, since the end of the exhaust pipe 3 must be bent downward in the supply cylinder 2, the internal structure becomes complicated and the production cost is increased.

An object of the present invention is to provide a supply / exhaust top structure of a forced supply / exhaust water heater that can solve the above-described problem.

(D) Means for Solving the Problems In the present invention, a double pipe is formed by concentrically providing an exhaust pipe in a supply cylinder extending in a lateral direction, and an exhaust passage is formed in the exhaust pipe. A water supply / exhaust top structure of a forced water supply / exhaust type water heater in which an air supply passage is formed between an air supply cylinder and an exhaust cylinder, wherein a rainwater prevention plate is provided in the air supply passage; A first rainwater prevention plate provided at an upper half circumference of an outer peripheral surface of a cylinder and separated rearward from a tip of the air supply passage, and a lower half circumference of an inner peripheral surface of the air supply cylinder, The present invention relates to a supply / exhaust top structure of a forced water supply / exhaust water heater, comprising a second rainwater prevention plate provided at a position separated rearward from the rainwater prevention plate.

(E) Function and effect With the above-described configuration, the present invention has the following function and effect.

In the present invention, the first and second rainwater prevention plates are provided on the upper half circumference of the outer peripheral surface of the exhaust cylinder and the lower half circumference of the inner peripheral surface of the air supply cylinder, respectively. Therefore, the length of protrusion from the wall can be significantly shorter than that of the conventional top structure, and the appearance can be improved.

In addition, the cooperation of the first and second rainwater prevention plates can reliably prevent rainwater from entering the supply / exhaust top with a simple structure, and, as described above, the first and second rainwater prevention plates. Since the prevention plates are provided on the upper half circumference of the outer peripheral surface of the exhaust cylinder and the lower half circumference of the inner peripheral surface of the air supply cylinder, respectively, the inflow of the combustion air is performed smoothly, and a stable combustion state can be obtained.

(F) Example Hereinafter, the present invention will be specifically described based on an example shown in the accompanying drawings.

As shown in FIG. 1, the air supply / exhaust top structure A has a double pipe structure composed of concentric air supply cylinders 12 and exhaust cylinders 17, and its tip is slightly outside the wall W to the outside. The base end is connected to a water heater C installed indoors via a supply / exhaust communication pipe 10 bent in an L-shape.

2 to 4 show the detailed structure of the air supply / exhaust top structure A. A rear end of the air supply / exhaust top structure A is connected to an annular flange 16 to be described later in a top structure insertion hole 11 penetrated through the wall W. The sleeves S having both ends opened are fitted.

A hollow cylindrical air supply cylinder 12 is provided in the sleeve S.
Is penetrated in a slightly downwardly inclined state toward the front end side, and the front end of the air supply cylinder 12 projects slightly forward from the front surface 13 of the wall W by a length l.

The supply cylinder 12 has a rear end extending rearward from a rear surface 14 of the wall W, and an extended end 15 connected to one end of the supply / exhaust communication pipe 10.

Further, the air supply cylinder 12 has an annular flange
The annular flange 16 is fixed to the rear surface 14 of the wall W.
By using bolts or the like, the air supply cylinder 12 can be fixedly attached to the wall surface W.

Next, the internal configuration of the air supply cylinder 12 will be described. In the air supply cylinder 12, a hollow cylindrical exhaust cylinder 17 having a smaller diameter than the air supply cylinder 12 is provided.
However, they are arranged concentrically.

With such a configuration, the top structure A according to the present embodiment
The air supply passage 18 having an annular cross section can be formed between the air supply cylinder 12 and the exhaust cylinder 17, and the exhaust passage 19 having a circular cross section can be formed in the exhaust cylinder 17.

Therefore, the combustion air “a” can be supplied to the water heater C through the air supply passage 18 and the air supply / exhaust communication tube 10, and the exhaust gas after combustion can be supplied to the water supply / exhaust air communication tube 10 and the exhaust passage 19.
Can be discharged to the outside.

Further, in the present embodiment, as is most apparent from FIG. 4, the upper half of the outer peripheral surface of the exhaust pipe 17 is
A first rainwater prevention plate 21 having a support rib 21a is attached at a position spaced rearward from the tip of the 18, and the lower half of the inner peripheral surface of the air supply cylinder 12 is located rearward from the first rainwater prevention plate 21. A second rainwater prevention plate 22 is attached to the separated location.

As shown in FIGS. 3 and 4, both the first and second rainwater prevention plates 21 and 22 have a semi-annular shape.

With this configuration, as shown in FIG. 2, the combustion air a can smoothly flow into the air supply passage 18 through the bent flow passage 23 formed between the rainwater prevention plates 21 and 22, and The rainwater prevention plates 21 and 22 functioning as weirs can reliably prevent rainwater from flowing into the air supply passage 18 of the top structure A.

Further, in the present embodiment, a semi-annular gap 24 is formed between the outer edge of the first rainwater prevention plate 21 and the inner surface of the air supply cylinder 12, while the inner edge of the second rainwater prevention plate 22 and the exhaust cylinder are formed. A semi-annular gap 25 is formed between the first and the inner surfaces of the combustion chamber 17 and the inflow of the combustion air a into the air supply passage 18 is ensured through the semi-annular gaps 24 and 25. Second rainwater prevention plate 2
The installation of the first and second 22 allows the combustion air a to flow into the air supply passage 18 as smoothly as possible, so that a stable combustion state can be obtained.

In addition, the cooperation of the first and second rainwater prevention plates 21 and 22 can reliably prevent rainwater from entering the top structure A with a simple structure, and manufacture the supply / exhaust top structure A at low cost. be able to.

Further, the first and second rainwater prevention plates 21 and 22 are respectively provided on the lower half of the inner peripheral surface of the air supply cylinder 12 and the upper half of the outer peripheral surface of the exhaust cylinder 17.
Is provided, air supply and exhaust can be performed from the same direction, and the length l of protrusion from the wall W can be significantly shortened as compared with the conventional top structure. Can be improved.

Further, in the present embodiment, in order to prevent as much as possible a part of the exhaust gas from the exhaust pipe 17 from being sucked into the air supply passage 18 together with fresh air, the exhaust pipe 17 It protrudes slightly forward from the front end flange 12a.

Then, the front end flange 12a of the supply cylinder 12 and the exhaust cylinder 1
The tip 17a of the 7 is both covered by bird-preventing means 20 formed of, for example, a truncated cone-shaped net.

In this embodiment, the bird protection means 20 is substantially detachably connected to the distal end 12a of the air supply cylinder 12.

That is, as shown in FIGS. 2 and 4, a flange 20a is formed at the base end of the bird-proofing means 20.
After being overlapped on the front end flange 12a of the air supply cylinder 12, the overlapping portion is mounted in the inner annular groove of the connection ring 30, and then the swaging piece 31 is bent inward, so that the birdproof means 20 is connected to the air supply cylinder 12. Can be linked.

In this connection, the top of the birdproofing means 20 comes into contact with the tip 17a of the exhaust pipe 17 in a tensioned state.

As described above, in this embodiment, the end of the double pipe constituted by the air supply cylinder 12 and the exhaust cylinder 17 is entirely covered with the birdproof means 20.
, The following effects can be obtained.

Foreign matter such as small birds, pebbles, fallen leaves and the like can be reliably prevented from entering the water heater C.

In the work of attaching the supply / exhaust top structure A to the wall W, etc.,
Since there is no need to touch the tips of the sharp supply cylinder 12 and the exhaust pipe 17, the mounting operation can be performed safely.

[Brief description of the drawings]

FIG. 1 is an explanatory view of the use state of the supply / exhaust top structure according to the present invention, FIG. 2 is an enlarged partial side sectional view of the supply / exhaust top structure,
FIG. 3 is a view taken in the direction of the arrow II in FIG. 2, FIG. 4 is an exploded perspective view of the supply / exhaust top structure, FIG. 5 is a sectional side view of the conventional supply / exhaust top structure, and FIG. It is an arrow view by the II-II line. In the figure, (A): Top supply / exhaust structure (12): Supply cylinder (17): Exhaust cylinder (18): Supply passage (19): Exhaust passage (20): Bird protection means (21): First rainwater Prevention plate (22): Second rainwater prevention plate

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Hiroshi Miura 43-1, Uozakihama-cho, Higashinada-ku, Kobe City, Hyogo Prefecture Inside Japan Yupro Co., Ltd. Within Nippon Yupro Co., Ltd. (72) Inventor Hisashi Nakamura 43-1, Uozakihama-cho, Higashinada-ku, Kobe City, Hyogo Prefecture Within Nippon Yupro Co., Ltd. (56) References JP-A-2-17315 (JP, A) 26142 (JP, U)

Claims (1)

(57) [Scope of request for utility model registration] An exhaust pipe (17) is provided concentrically within a supply cylinder (12) extending laterally to form a double pipe, and an exhaust passage (19) is provided in the exhaust pipe (17). A water supply / exhaust top structure of a forced air supply / exhaust type water heater in which an air supply passage (18) is formed between an air supply cylinder (12) and an exhaust cylinder (17). A first rainwater preventive plate provided at a location on the upper half of the outer peripheral surface of the exhaust pipe (17) and separated rearward from the tip of the air supply passage (18); The lower half of the inner peripheral surface of the air supply cylinder (12);
The second provided at a location separated from the rainwater prevention plate (21) rearward
A water supply / exhaust top structure of a forced water supply / exhaust water heater, comprising: a rainwater prevention plate (22);